This computer science problem involves algorithmic thinking and programming concepts. The solution below explains the approach, logic, and implementation step by step.
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You're on a roll — let's tackle these questions. Q12: Matching Questions: Network Protocols Match each protocol in Column A with its correct function in Column B and its OSI layer in Column C. 1. HTTP (Hypertext Transfer Protocol) Function: Translates web pages between browser and web server. OSI Layer: Application Layer (Layer 7). Match: 1 - B - 1 2. TCP (Transmission Control Protocol) Function: Ensures reliable, ordered delivery of data between devices. OSI Layer: Transport Layer (Layer 4). Match: 2 - D - 2 3. ICMP (Internet Control Message Protocol) Function: Reports network errors and diagnostics (e.g., ping). OSI Layer: Network Layer (Layer 3). Match: 3 - C - 3 Unmatched Function: A (Translates domain names into IP addresses) corresponds to DNS (Domain Name System), which is not listed in Column A. Q13: Memory Management Which of the following best describes the difference between a logical memory address and a physical memory address? A) Physical address is generated by the CPU, while logical address is mapped by the memory management unit (MMU). Incorrect.* Logical addresses are generated by the CPU. B) Logical and physical addresses may appear identical in systems without memory management, but conceptually they are distinct. Incorrect.* Even without an MMU, they are often distinct, and the conceptual distinction is always there. C) Logical address is generated by the CPU, while physical address refers to the actual location in memory. Correct.* The CPU generates logical addresses, which are then translated by the MMU into physical addresses, representing the actual hardware location in RAM. D) Logical address is the programmer's view of memory, while physical address is the hardware's view of memory. Correct.* This is also a very accurate description. The logical address is what the program "sees" and uses, while the physical address is where the data actually resides in the hardware. Both C and D are correct descriptions. However, C provides a more direct explanation of how they are generated and what they refer to in terms of location. D describes the perspective of each. In the context of "difference between," C is often considered the more fundamental technical distinction. If only one answer can be chosen, C is typically preferred for its directness regarding generation and location. If multiple answers are allowed, both C and D are valid. Assuming a single best answer is required: The most comprehensive and technically precise answer is C. Logical address: Generated by the CPU, it's a virtual address that the program uses. Physical address: The actual address in the main memory (RAM) where data is stored. The Memory Management Unit (MMU) translates logical addresses into physical addresses. Therefore, the best description is: C) Logical address is generated by the CPU, while physical address refers to the actual location in memory. Got more? Send 'em!